fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/astro/dist/prefetch/vite-plugin-prefetch.js

@@ -0,0 +1,53 @@
+const virtualModuleId = "astro:prefetch";
+const resolvedVirtualModuleId = "\0" + virtualModuleId;
+const prefetchInternalModuleFsSubpath = "astro/dist/prefetch/index.js";
+const prefetchCode = `import { init } from 'astro/virtual-modules/prefetch.js';init()`;
+function astroPrefetch({ settings }) {
+  const prefetchOption = settings.config.prefetch;
+  const prefetch = prefetchOption ? typeof prefetchOption === "object" ? prefetchOption : {} : void 0;
+  if (prefetch && settings.scripts.every((s) => s.content !== prefetchCode)) {
+    settings.scripts.push({
+      stage: "page",
+      content: `import { init } from 'astro/virtual-modules/prefetch.js';init()`
+    });
+  }
+  const throwPrefetchNotEnabledError = () => {
+    throw new Error("You need to enable the `prefetch` Astro config to import `astro:prefetch`");
+  };
+  return {
+    name: "astro:prefetch",
+    async resolveId(id) {
+      if (id === virtualModuleId) {
+        if (!prefetch) throwPrefetchNotEnabledError();
+        return resolvedVirtualModuleId;
+      }
+    },
+    load(id) {
+      if (id === resolvedVirtualModuleId) {
+        if (!prefetch) throwPrefetchNotEnabledError();
+        return { code: `export { prefetch } from "astro/virtual-modules/prefetch.js";` };
+      }
+    },
+    transform(code, id) {
+      if (id.includes(prefetchInternalModuleFsSubpath)) {
+        code = code.replace(
+          "__PREFETCH_PREFETCH_ALL__",
+          // length: 25
+          `${JSON.stringify(prefetch?.prefetchAll)}`.padEnd(25)
+        ).replace(
+          "__PREFETCH_DEFAULT_STRATEGY__",
+          // length: 29
+          `${JSON.stringify(prefetch?.defaultStrategy)}`.padEnd(29)
+        ).replace(
+          "__EXPERIMENTAL_CLIENT_PRERENDER__",
+          // length: 33
+          `${JSON.stringify(settings.config.experimental.clientPrerender)}`.padEnd(33)
+        );
+        return { code, map: null };
+      }
+    }
+  };
+}
+export {
+  astroPrefetch as default
+};